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  Benthic-Optimised Marine Environment Classification (BOMEC) for New Zealand waters

Distributional data for eight taxonomic groups (asteroids, bryozoans, benthic foraminiferans, octocorals, polychaetes, matrix-forming scleractinian corals, sponges, and benthic fish) have been used to train an environmental classification for those parts of New Zealand's 200 n. mile Exclusive Economic Zone (EEZ) with depths of 3000 m or less. A variety of environmental variables were used as input to this process, including estimates of depth, temperature, salinity, sea surface temperature gradient, surface water productivity, suspended sediments, tidal currents, and seafloor sediments and slope. These variables were transformed using results averaged across eight Generalised Dissimilarity Modelling analyses that indicate relationships between species turnover and environment for each species group. The matrix of transformed variables was then classified using k-medoids clustering to identify an initial set of 300 groups, with relationships between these groups then described using agglomerative hierarchical clustering. Groups at a fifteen group level of classification appropriate for use at a whole-of-EEZ scale are described; the classification can also be used at other levels of detail, for example when higher levels of classification detail are required to discriminate variation within study areas of more limited extent. Although not formally tested in this analysis, we expect the analytical process used here to increase the biological discrimination of the environmental classification. That is, the resulting environmental groups are more likely to have similar biological characteristics than when the input environmental variables are selected, weighted, and perhaps transformed using qualitative methods. The input environmental data were on a 1 km x1 km grid and the 15-group classification output exists as an ESRI shapefile.
 
Citation proposal
Ashley Rowden (NIWA National Institute of Water and Atmospheric Research Ltd). . https://dc.niwa.co.nz:/niwa_dc/srv/api/records/5a552e3a-05d3-55fe-20dd-4cb29a1dd323
 
  • Identification
  • Content
  • Distribution
  • Quality
  • Lineage
  • Spatial rep.
  • Ref. system
  • Acquisition info
  • Metadata
  • Portrayal
  • Md. constraints
  • Md. maintenance
  • Schema info

Identification

Data identification

Citation

Date ( Publication )
2012-02-01T21:21:00
Date ( Publication )
2012-02-01T21:21:00
Purpose
To generate a marine environment classification with relevance to the benthic environment within New Zealand waters 
Credit
Project was completed by NIWA for the then Ministry of Fisheries (now Ministry for Primary Industries - MPI). 
Status
Completed  

  Point of contact

NIWA National Institute of Water and Atmospheric Research Ltd  
Wellington
New Zealand

  Author

NIWA National Institute of Water and Atmospheric Research Ltd  
Wellington
New Zealand
Spatial representation type
Vector  
Topic category
  • Environment

Extent

Description
New Zealand EEZ in depths of < 3000 m. 

coordinates

No information provided.
N
S
E
W


TimePeriod
2008-07-01T00:00:002009-06-30T00:00:00 
  • marine environment classification, BOMEC
NIWA Project Codes
  • BEN200601

Legal constraints

Use limitation
See the link to the published report for a description of the input data and analysis. 
Other constraints
Contact the Research Data Manager at Ministry for Primary Industries (MPI) for permission and access. [email protected] 

Security constraints

Use limitation
Use of data and final output requires permission of Research Data Manager at MPI. [email protected] 
Classification
Confidential  

Associated resource

Title
Leathwick, J.R.; Rowden, A.; Nodder, S.; Gorman, R. ; Bardsley, S.; Pinkerton, M.; Baird, S.J.; Hadfield, M.; Currie, K.; Goh, A. (2012). A Benthic-optimised Marine Environment Classification (BOMEC) for New Zealand waters. New Zealand Aquatic Environment and Biodiversity Report No. 88. 54 p. 
Association Type
Larger work citation  

Locale

Language
English  

Character encoding

No information provided.
 

Distribution

Digital transfer options

OnLine resource

Point of truth URL of this metadata record

OnLine resource
BOMEC report

Publication describing objective, input data, analyses, and results.

 

Lineage

Lineage

Statement
See the link to the published report for a description of the input data and analysis. 

Scope

Hierarchy level
Dataset  
Dataset
BOMEC shapefile 
 

Ref. system

Reference system

No information provided.
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326

Reference system identifier
NZST/NZDT

 

Metadata

mdb:MD_Metadata

Metadata identifier
5a552e3a-05d3-55fe-20dd-4cb29a1dd323

Locale

Language
English  
Character encoding
UTF8  

  Point of contact

NIWA National Institute of Water and Atmospheric Research  
301 Evans Bay Parade
Hataitai
Wellington
6021
New Zealand
 

Hierarchy level

Resource scope
Dataset  

Text

No information provided.
Date info ( Creation )
2015-02-13T11:13:16
Title
ISO 19115-3 
 
 

Md. constraints

Security constraints

Text

No information provided.
Classification
Unclassified  
 

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5a552e3a-05d3-55fe-20dd-4cb29a1dd323   Access to the portal Read here the full details and access to the data.

  Associated resources

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